Investigation of different tribological systems during full forward impact extrusion of aluminum alloy EN AW 6082

Abstract

Purpose

The modification of the tribological system is an essential aspect of the implementation of resource-saving processes in cold forming. As a result, the focus of this contribution is the influence of the tribological system on the full forward impact extrusion of aluminum alloy EN AW 6082 (T6) with regard to reduction of friction and wear.

Design/methodology/approach

The investigations included a variation of lubricant and die treatment. Friction, wear and the mean arithmetic height Sa were used as evaluation criteria. The aim was to find a suitable die surface treatment and a suitable lubricant on the basis of the evaluation criteria.

Findings

The experiments indicated that each of the selected tribological systems prevents physical metallic contact between tool and workpiece and thus prevents the formation of wear. Nevertheless, differences were found in the areas of smoothing of workpiece surfaces and adhesive strength of lubricants.

Originality/value

As general cause effect relationships between die coating and lubricant are not known in the field of bulk metal forming of aluminum, fundamental investigations are described below. The investigations focus on the influence of the material and the tribological system on friction as well as wear.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-08-2019-0316

Citation

Müller, M., Hild, R., Trauth, D. and Bergs, T. (2019), "Investigation of different tribological systems during full forward impact extrusion of aluminum alloy EN AW 6082", Industrial Lubrication and Tribology, Vol. 72 No. 6, pp. 709-712. https://doi.org/10.1108/ILT-08-2019-0316